Fixed integer signing bug in cubic bytes/packet implementation

net/quic/core/congestion_control/tcp_cubic_sender_packets.cc

Index: net/quic/core/congestion_control/tcp_cubic_sender_packets.cc
diff --git a/net/quic/core/congestion_control/tcp_cubic_sender_packets.cc b/net/quic/core/congestion_control/tcp_cubic_sender_packets.cc
index 0a5d2656394232985fa926a6782b4f3cd049db2c..2a54db6b19d444f06e0fe0369b17e3122d41ec67 100644
--- a/net/quic/core/congestion_control/tcp_cubic_sender_packets.cc
+++ b/net/quic/core/congestion_control/tcp_cubic_sender_packets.cc
@@ -46,6 +46,16 @@ TcpCubicSenderPackets::TcpCubicSenderPackets(
 
 TcpCubicSenderPackets::~TcpCubicSenderPackets() {}
 
+void TcpCubicSenderPackets::SetFromConfig(const QuicConfig& config,
+                                          Perspective perspective) {
+  TcpCubicSenderBase::SetFromConfig(config, perspective);
+  if (FLAGS_quic_fix_cubic_convex_mode &&
+      config.HasReceivedConnectionOptions() &&
+      ContainsQuicTag(config.ReceivedConnectionOptions(), kCCVX)) {
+    cubic_.SetFixConvexMode(true);
+  }
+}
+
 void TcpCubicSenderPackets::SetCongestionWindowFromBandwidthAndRtt(
     QuicBandwidth bandwidth,
     QuicTime::Delta rtt) {